2 articles about Oyasumi Punpun
The subject by its numbers · The Inquiry
Seven — inquiry. That is the reduction of this name, and the shelf it is read from.
What the 7 brings is inquiry. The reference files it as an open question. Whatever else this section is doing, it is doing it with the 7's pull toward the hidden and the unresolved.
The Inquiry — what is unresolved, unexplained, or deliberately withheld →Part 231: The Unsent Letters of Inio Asano: A Destiny of Creative Communication
Part 145: The Dark Seinen's Unsettling Symphony: Punpun, Homunculus, and Ichi through the Numbers